Abstract: This disclosure provides a solution for improving performance in a virtual machine. In this method, a platform independent intermediate representation of a code segment in an application is obtained from a first virtual machine which is operating on a first platform. The platform independent intermediate representation is generated through a run-time compilation by the first virtual machine. Native code is generated based on the platform independent intermediate representation, in which at least one piece of the native code corresponds to a second platform which is different from the first platform. The at least one piece of the native code is distributed to a second virtual machine which is operating on the second platform.

Abstract: This disclosure provides a solution for improving performance in a virtual machine. In this method, a platform independent intermediate representation of a code segment in an application is obtained from a first virtual machine which is operating on a first platform. The platform independent intermediate representation is generated through a run-time compilation by the first virtual machine. Native code is generated based on the platform independent intermediate representation, in which at least one piece of the native code corresponds to a second platform which is different from the first platform. The at least one piece of the native code is distributed to a second virtual machine which is operating on the second platform.

Abstract: Correlating two storage rings based on an access rate for an object. A correlative dual hash ring includes a first ring of storage drives and a second ring of storage drives. Objects and replicas are allocated to either a first ring or a second ring.

Abstract: Correlating two storage rings based on an access rate for an object. A correlative dual hash ring includes a first ring of storage drives and a second ring of storage drives. Objects and replicas are allocated to either a first ring or a second ring.

Abstract: Correlating two storage rings based on an access rate for an object. A correlative dual hash ring includes a first ring of storage drives and a second ring of storage drives. Objects and replicas are allocated to either a first ring or a second ring.

Abstract: A method and system for controlling load admission rate of an application server is provided. In the method, actual heap utilization and load admission rate of the application server in current control cycle are detected; based on the detected actual heap utilization and load admission rate, load characteristics variation parameters of the application server are estimated; and control gain of a feedback controller is calculated based on the load characteristics variation parameters; the feedback controller calculates desired load admission rate of the application server in next control cycle by using the calculated control gain. The load admission rate of the application server can be adaptively controlled by tracking changes in workload characteristics of the application server, such that the actual heap utilization of the application server is maintained at or close to target heap utilization.

Abstract: A method and system for controlling load admission rate of an application server is provided. In the method, actual heap utilization and load admission rate of the application server in current control cycle are detected; based on the detected actual heap utilization and load admission rate, load characteristics variation parameters of the application server are estimated; and control gain of a feedback controller is calculated based on the load characteristics variation parameters; the feedback controller calculates desired load admission rate of the application server in next control cycle by using the calculated control gain. The load admission rate of the application server can be adaptively controlled by tracking changes in workload characteristics of the application server, such that the actual heap utilization of the application server is maintained at or close to target heap utilization.